Liquid crystal display device being switchable between transmission mode and reflection mode and display module thereof

ABSTRACT

The present disclosure provides a liquid crystal display device being switchable between transmission mode and reflection mode and a liquid crystal display module thereof, the liquid crystal display module includes a liquid crystal unit and a transflective driving unit arranged in an overlapped mode; wherein, the transflective driving unit further includes: a first substrate, a first electrode layer, a first liquid layer and a second liquid layer; the first liquid layer in the electric field has the characteristics of the changeable state of spread and contraction and high light reflectance; the state of spread and contraction of the first liquid layer is changed by controlling the voltage of the first electrode layer to achieve the switching between the transmission mode and the reflection mode of the liquid crystal display module. The LCD device has the display effect of high opening, high transmissive and high reflective.

FIELD OF THE DISCLOSURE

The present disclosure relates to a liquid crystal display device field,and more particularly to a liquid crystal display device beingswitchable between transmission mode and reflection mode and a displaymodule thereof.

BACKGROUND OF THE DISCLOSURE

To make the LCD in the low ambient illumination of indoor and the highambient illumination of outdoor has good display quality, atransflective LCD has been invented, the transflective LCD divides thespace of the display area of the pixel to a transmissive portion and areflective portion, generally, using the transmission mode in the lowambient illumination of indoor and using the reflection mode or thetransflective mode in the high ambient illumination of outdoor. But amajor problem in the transflective LCD is: the reflective electrode ofthe pixel reflective area is opaque, so that the ratio of the openingarea of the transmissive display area is reduced and the lighttransmittance in the transmissive mode is very low.

SUMMARY OF THE DISCLOSURE

The embodiment of the present disclosure provides a liquid crystaldisplay device being switchable between transmission mode and reflectionmode and a display module thereof to solve the technical problem of thelight transmittance of the transflective LCD device in the transmissivemode is very low in the prior art.

In order to solve the above problem, the embodiment of the presentdisclosure provides a liquid crystal display module being switchablebetween transmission mode and reflection mode, the liquid crystaldisplay module includes a liquid crystal unit and a transflectivedriving unit arranged in an overlapped mode; the transflective drivingunit further includes:

a first substrate;

a first electrode layer arranged on the first substrate;

a first liquid layer arranged on the first electrode layer; the firstliquid layer in the electric field has the characteristics of thechangeable state of spread and contraction and high light reflectance;

a second liquid layer surrounding and covering the first liquid layer;the first liquid layer is immiscible with the second liquid layer;

the state of spread and contraction of the first liquid layer is changedby controlling the voltage of the first electrode layer to achieve theswitching between the transmission mode and the reflection mode of theliquid crystal display module.

According to the preferred embodiment of the present disclosure, furtherarranges an insulating layer between the first liquid layer and thefirst electrode layer, the insulating layer has an affinity for thefirst liquid layer.

According to the preferred embodiment of the present disclosure, part ofthe first electrode layer is arranged corresponding to the first liquidlayer, so that the first liquid layer driven by the voltage of the firstelectrode layer can shrink to the non-corresponding position of thefirst electrode layer.

According to the preferred embodiment of the present disclosure, bothends of the first liquid layer further arranged a block, the block hasan affinity for the second liquid layer.

According to the preferred embodiment of the present disclosure, thesecond liquid layer is transparent liquid.

According to the preferred embodiment of the present disclosure, thesecond liquid layer is water.

According to the preferred embodiment of the present disclosure, thefirst liquid layer is an oil layer containing a white pigment.

According to the preferred embodiment of the present disclosure, theliquid crystal display module further comprises a second substrate and athird substrate, the corresponding sides of the second substrate and thethird substrate is arranged a second electrode layer and a thirdelectrode layer respectively, a liquid crystal layer is arranged betweenthe second electrode layer and the third electrode layer, the secondelectrode layer and the third electrode layer are used to drive thedeflection of the liquid crystal in the liquid crystal layer.

According to the preferred embodiment of the present disclosure, theliquid crystal display module further comprises a first polarizer and asecond polarizer arranged outside of the third substrate and the firstsubstrate respectively.

In order to solve the above technical problem, the present disclosurefurther provides a liquid crystal display device being switchablebetween transmission mode and reflection mode including the liquidcrystal display module of any one of above embodiment described.

Compared to the above technical problem, the liquid crystal displaydevice being switchable between transmission mode and reflection modeand the display module thereof of the present disclosure provided usethe state of spread and contraction of the liquid driven by theelectrode to achieve the switching between the transmission mode and thereflection mode of the liquid crystal display device, and further tomake the liquid crystal display device in the transmission mode and thereflection mode has the display effect of high opening, hightransmissive and high reflective.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments or the prior arttechnical solutions embodiment of the present disclosure, it willimplement the following figures for the cases described in the prior artor require the use of a simple introduction, Obviously, in the followingdescription The drawings are only some embodiments of the presentdisclosure, those of ordinary skill in speaking, without creativeefforts of the premise, you can also obtain other drawings based onthese drawings.

Figure 1 is a schematic structure view of the preferred embodiment ofthe liquid crystal display module being switchable between transmissionmode and reflection mode of the present disclosure;

FIG. 2 is a schematic view of the optical path of the reflective mode ofthe liquid crystal display module as a bright state in the FIG. 1embodiment;

FIG. 3 is a schematic view of the optical path of the reflective mode ofthe liquid crystal display module as a dark state in the FIG. 1embodiment;

FIG. 4 is a schematic view of the optical path of the transmissive modeof the liquid crystal display module as a dark state in the FIG. 1embodiment;

FIG. 5 is a schematic view of the optical path of the transmissive modeof the liquid crystal display module as a bright state in the FIG. 1embodiment;

FIG. 6 is a schematic structure view of the preferred embodiment of theliquid crystal display device being switchable between transmission modeand reflection mode of the present disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The accompanying drawings and the following embodiments, the presentdisclosure is described in further detail for. Of particular note it isfor illustration only the following embodiments of the presentdisclosure, but not to the scope of the present disclosure will belimited. Similarly, the embodiment of the present disclosure is onlypart of the following examples but not all embodiments, those ofordinary skill in making all other embodiments no creative effortobtained, are within the scope of the present disclosure to protect.

Please refer to FIG. 1, FIG. 1 is a schematic structure view of thepreferred embodiment of the liquid crystal display module beingswitchable between transmission mode and reflection mode of the presentdisclosure, the liquid crystal display module includes but not limited aliquid crystal unit 200 and a transflective driving unit 100 arranged inan overlapped mode.

In particular, the transflective driving unit 100 includes a firstsubstrate 110, a first electrode layer 120, a first liquid layer 130, asecond liquid layer 140, an insulating layer 150 and a block 160.

The first electrode layer 120 is arranged on the first substrate 110,the insulating layer 150 is arranged on the first electrode layer 120,preferably, the insulating layer 150 has an affinity for the firstliquid layer 130 to make the first liquid layer 130 in the case of thefirst electrode layer 120 without applied voltage can be well expanded.The first liquid layer 130 is arranged on the insulating layer 150,further the first liquid layer 130 in the electric field has thecharacteristics of the changeable state of spread and contraction andhigh light reflectance, preferably, the first liquid layer 130 is an oillayer containing a white pigment. This material can be well reflectedlight, further the state of spread and contraction can be changed in thedriven field of the first electrode layer 120.

Wherein, part of the first electrode layer 120 is arranged correspondingto the first liquid layer 130, so that the first liquid layer 130 drivenby the voltage of the first electrode layer 120 can shrink to thenon-corresponding position of the first electrode layer 120, thespecific driving principle and procedure will be described in detail inthe subsequent content.

The second liquid layer 140 surrounds and covers the first liquid layer130, the first liquid layer 130 is immiscible with the second liquidlayer 140. Preferably, the second liquid layer 140 is transparentliquid, more preferably is water. The block 160 is arranged both ends ofthe first liquid layer 130, and the block 160 has an affinity for thesecond liquid layer 140, i.e. Hydrophilic. The characteristic of theembodiment of the present disclosure is controls the state of spread andcontraction of the first liquid layer 130 by the first electrode layer120 to achieve the switching between the transmission mode and thereflection mode of the liquid crystal display module.

The liquid crystal unit 200 includes a second substrate 210 and a thirdsubstrate 220, the corresponding sides of the second substrate 210 andthe third substrate 220 are arranged a second electrode layer 230 and athird electrode layer 240 respectively, a liquid crystal layer 250 isarranged between the second electrode layer 230 and the third electrodelayer 240, the second electrode 230 and the third electrode layer 240are used to drive the deflection of the liquid crystal in the liquidcrystal layer 250. Wherein, the liquid crystal layer 250 is aligned bythe vertical alignment.

Further, the liquid crystal display module further includes a firstpolarizer 310 and a second polarizer 320, the first polarizer 310 andthe second polarizer 320 are arranged outside of the third substrate 220and the first substrate 110 respectively.

It notes that, the electrode layer, the substrate, the insulating etc.of the present embodiment are made by transparent material, so thatlight can pass through.

The following control method and principle of the present disclosurewill be described in detail.

The Reflection mode and transmission mode switching scheme is asfollows: the spread and contraction of the first liquid layer 130 in thetransflective driving unit 100 controlled by the first electrode layer120 applied voltage. Because the first liquid layer 130 contains a whitepigment, can be well reflected light performance as a reflective layer,and this state of the display device is reflection mode; after the firstelectrode layer 120 applying voltage, the first liquid layer 130 will beshrunk, and the display device is transmission mode.

The principle of the reflection mode is as follows: please refer to FIG.2 and FIG. 3, FIG. 2 is a schematic view of the optical path of thereflective mode of the liquid crystal display module as a bright statein the FIG. 1 embodiment, FIG. 3 is a schematic view of the optical pathof the reflective mode of the liquid crystal display module as a darkstate in the FIG. 1 embodiment. The first electrode layer 120 remainsclose state, the first liquid layer 130 in the transflective drivingunit 100 is spreading state. The voltage difference between the pair ofelectrodes is formed by controlling the second electrode layer 230 andthe third electrode 240 to rotate the liquid crystal in the liquidcrystal unit 200 and control the level of light reflectance. When thevoltage difference between the second electrode layer 230 and the thirdelectrode layer 240 is 0, the liquid crystal molecules are verticallyaligned, the ambient light enters in the liquid crystal unit 200 throughthe first polarizer 310, and the liquid crystal layer 250 does notgenerate the effect of the polarization to light, after reflecting thefirst liquid layer 130 can through the first polarizer 310, the liquidcrystal display device is performance as a bright state; when applying acertain voltage difference between the second electrode layer 230 andthe third electrode layer 240, the liquid crystal molecules is rotating,and the incident and the reflected light generating polarizationtransition to achieve the low reflectance state of light, i.e. the darkstate of the reflection mode. The arrow in the figure indicates thepropagation of light in the environment.

The principle of the transmission mode is as follows: please refer toFIG. 4 and FIG. 5, FIG. 4 is a schematic view of the optical path of thetransmissive mode of the liquid crystal display module as a dark statein the FIG. 1 embodiment, FIG. 5 is a schematic view of the optical pathof the transmissive mode of the liquid crystal display module as abright state in the FIG. 1 embodiment. The first electrode layer 120remains open state, the first liquid layer 130 in the transflectivedriving unit 100 is shrink state. In this case, the liquid crystaldisplay device is performance as a transmissive display device.

The voltage difference between the pair of electrodes is formed bycontrolling the second electrode layer 230 and the third electrode 240to rotate the liquid crystal in the liquid crystal unit 200 and controlthe back light pass rates. When the voltage difference between thesecond electrode layer 230 and the third electrode layer 240 is 0, theliquid crystal molecules are vertically aligned, the back light entersin the liquid crystal unit 200 through the second polarizer 320, and theliquid crystal layer 250 does not generate the effect of thepolarization to light, because the existence of the first polarizer 310,the emitted light is less, in this case, the liquid crystal display isperformance as a dark state; when applying a certain voltage differencebetween the second electrode layer 230 and the third electrode layer240, the liquid crystal molecules is rotating, and the incident backlight through the second polarizer 320 is generating polarizationtransition to achieve the same purpose of the polarization direction ofthe first polarizer 310, thereby increasing the pass rate of the backlight and the performance of the liquid crystal display device as brightstate. The arrow in the figure indicates the propagation of light in theenvironment.

Additionally, the embodiment of the present disclosure further providesa liquid crystal display device being switchable between transmissionmode and reflection mode, please refer to FIG. 6, FIG. 6 is a schematicstructure view of the preferred embodiment of the liquid crystal displaydevice being switchable between transmission mode and reflection mode ofthe present disclosure. Wherein, the liquid crystal display deviceincludes a case 8 and the liquid crystal display module in the aboveembodiment arranged in the case 8. About LCD modules, please refer tothe technical features of the above embodiments described in detail,while the rest of the technical features of the structure of a liquidcrystal display, in understanding the scope of the skilled person, alsowill not repeat them here.

Compared to the prior art, the liquid crystal display device beingswitchable between transmission mode and reflection mode and the displaymodule thereof of the present disclosure provided, using the state ofspread and contraction of the electrode driving liquid to achieve theswitching between the transmission mode and the reflection mode of theliquid crystal display device, and further to make the liquid crystaldisplay device in the transmission mode and the reflection mode has thedisplay effect of high opening, high transmissive and high reflective.

Above are only embodiments of the present disclosure is not patented andtherefore limit the scope of the disclosure, all the contents of thepresent disclosure utilize the specification made equivalent structuresor equivalent process transformation, either directly or indirectlyrelated technologies used in other areas are included in the patentempathy scope of the disclosure.

What is claimed is:
 1. A liquid crystal display module being switchablebetween transmission mode and reflection mode, wherein, the liquidcrystal display module comprises a liquid crystal unit and atransflective driving unit arranged in an overlapped mode; thetransflective driving unit further comprises: a first substrate; a firstelectrode layer arranged on the first substrate; a first liquid layerarranged on the first electrode layer; the first liquid layer in theelectric field has the characteristics of the changeable state of spreadand contraction and high light reflectance; a second liquid layersurrounding and covering the first liquid layer; the first liquid layeris immiscible with the second liquid layer; the state of spread andcontraction of the first liquid layer is changed by controlling thevoltage of the first electrode layer to achieve the switching betweenthe transmission mode and the reflection mode of the liquid crystaldisplay module.
 2. The liquid crystal display module according to claim1, wherein, further arranges an insulating layer between the firstliquid layer and the first electrode layer, the insulating layer has anaffinity for the first liquid layer.
 3. The liquid crystal displaymodule according to claim 2, wherein, part of the first electrode layeris arranged corresponding to the first liquid layer, so that the firstliquid layer driven by the voltage of the first electrode layer canshrink to the non-corresponding position of the first electrode layer.4. The liquid crystal display module according to claim 1, wherein, bothends of the first liquid layer further arranged a block, the block hasan affinity for the second liquid layer.
 5. The liquid crystal displaymodule according to claim 1, wherein, the second liquid layer istransparent liquid.
 6. The liquid crystal display module according toclaim 5, wherein, the second liquid layer is water.
 7. The liquidcrystal display module according to claim 1, wherein, the first liquidlayer is an oil layer containing a white pigment.
 8. The liquid crystaldisplay module according to claim 8, wherein, the liquid crystal displaymodule further comprises a second substrate and a third substrate, thecorresponding sides of the second substrate and the third substrate isarranged a second electrode layer and a third electrode layerrespectively, a liquid crystal layer is arranged between the secondelectrode layer and the third electrode layer, the second electrodelayer and the third electrode layer are used to drive the deflection ofthe liquid crystal in the liquid crystal layer.
 9. The liquid crystaldisplay module according to claim 8, wherein, the liquid crystal displaymodule further comprises a first polarizer and a second polarizerarranged outside of the third substrate and the first substraterespectively.
 10. A liquid crystal display device being switchablebetween transmission mode and reflection mode, wherein, the liquidcrystal display device comprises the liquid crystal display module asclaimed in claim 1.